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Belgrade, Serbia

Tomasovic N.,Energoprojekt ENTEL
Thermal Science | Year: 2015

The aim of this paper is to analyse the expansion of the thermal generation in the long-term for the Western Balkan region. This paper concentrates on the estimation of long-term energy data for the (Western) Balkan countries. The process was implemented by the use of the PRIMES model in order to perform simulations for the future growth of electricity supply and demand in the region. Two scenarios were applied. The first (Baseline) scenario was based on the current energy path of each country and on the absence of any specific energy policy like tax emissions or renewable subsidies. The second (Reference) scenario was practically a series of "environmental" sub-scenarios, based on specific energy subsidy policy applied to the electricity generated by renewable sources. Results were given for the period between 2015 and 2050 in 5-year steps and conclusions were made for the whole region. As such, the results can feed up trials of energy planning referring to the future energy condition.

Petrovic Becirovic S.B.,Energoprojekt ENTEL | Manic N.G.,University of Belgrade | Stojiljkovic D.D.,University of Belgrade
Thermal Science | Year: 2015

Pellet stoves may play an important role in Serbia in the future when fossil fuel fired conventional heating appliances are replaced by more efficient and environmentally friendly devices. Experimental investigation was conducted in order to examine the influence of wood pellet quality, as well as burner capacity (6, 8, and 10 kW), used in the same stove configuration, on the performance of pellet stove with declared nameplate capacity of 8 kW. The results obtained showed that in case of nominal load and combustion of pellets recommended by the stove manufacturer, stove efficiency of 80.03% was achieved. The use of lower quality pellet caused additional 1.13 kW reduction in heat output in case of nominal load and 0.63 kW in case of reduced load. This was attributed to less favourable properties and lower bulk and particle density of lower quality pellet. The use of different burner capacity has shown to have little effect on heat output and efficiency of the stove when pre-set values in the control system of the stove were not altered. It is concluded that replacement of the burner only is not sufficient to increase/decrease the declared capacity of the same stove configuration, meaning that additional measures are necessary. These measures include a new set-up of the stove control system, which needs to be properly adjusted for each alteration in stove configuration. Without the adjustment mentioned, declared capacity of the stove cannot be altered, while its CO emission shall be considerably increased.

Mandic-Lukic J.,Energoprojekt ENTEL | Simic N.,Elektrotehnicki Fakultet U Beogradu | Stojanovic B.,Energoprojekt ENTEL | Milinkovic B.,Energoprojekt ENTEL
2011 19th Telecommunications Forum, TELFOR 2011 - Proceedings of Papers | Year: 2011

The following document presents results of study and experimental research of electrical installations as Smart Home systems transmission medium. In the previous research it is especially demonstrated the influence of installations nods, i.e. distribution boards. Results presented herewith aim to ensure better understanding and solving this problem. The procedure of approximately determination of nodes impedance is presented. The analysis and the optimal impedance values specification of communication equipment for the electrical installation purpose are presented. © 2011 IEEE.

Becirovic S.P.,Energoprojekt ENTEL | Vasic M.,Energoprojekt ENTEL
Energy and Buildings | Year: 2013

Efficient use of energy has become an imperative in the modern world, mainly for the reasons associated with environmental pollution, sustainable development, security of energy supply and global geo-political stability. Having in mind that the building sector is responsible for 40% of the European Union's total energy consumption, every improvement made in order to improve building energy performance is deemed largely beneficial. Serbia has invested in extensive national energy-efficiency program with an aim to enable refurbishment of 62 public buildings, namely schools, health care and social care institutions. Approach used in order to identify the cost optimal improvement of each building was developed in line with EU recommendations and was proven trustful in terms of results and final project outcome. Measurement conducted in order to verify energy savings achieved confirmed that annual gross final energy consumption was reduced by 47%, thereby enabling related carbon footprint to be reduced by 5.038 tCO2/a in total. Project-specific financial indicators have shown that energy savings achieved resulted in acceptable payback period for the investments made, equalling approximately 13 years in average. This is considered acceptable having in mind poor initial condition of the facilities refurbished and low price of locally available and commonly used coal. © 2013 Elsevier B.V. All rights reserved.

Zivotic M.M.,Energoprojekt ENTEL | Stojiljkovic D.D.,University of Belgrade | Jovovic A.M.,University of Belgrade | Cudic V.V.,Institute of Public Health
Hemijska Industrija | Year: 2012

In Serbia, the ash from power plants has long been labelled as hazardous waste. With the adoption of the appropriate legislation this ash became waste with the potential usage. In this paper an analysis of the fly ash and bottom ash composition, which are disposed of in the power plant "Nikola Tesla A" landfill, is presented. Thirty samples, divided into three sets, were analyzed for trace elements As, Ba, Be, Cd, Co, Cr, Cu, Mn, Mo, Ni, Pb, Ti, V and Zn. The first and second set of samples were taken at the depth of 0.0-0.6 m, from cassette III, at the place of waste discharge (set I) and in the centre of the cassette (set II).The third set of samples was taken from the same cassette spot but at the different depth. The estimated variations in quality within individual sets, as well as the comparison between sets I and II, were performed. The repeatability of results by the depth of cassette (set III) was also analyzed. The mixture consisting of 79.4% limestone, 17% clay, 0.5% sand, 0.55% iron ore, 0.55% of steel mill waste and 2% ash from the thermal power plant "Nikola Tesla A" was adopted as the reputable mixture for cement making. For concrete making, the same cement mixture was used but with 2.1% of the same ash material added. The results showed possibility of further fly and bottom ash use as the cement and concrete material.

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